Just figured I'd mention. The HE-SL apparently has 2 64 bit memory
busses, unfortunately both cpu's are on a shared 133 Mhz FSB, so the
second memory bus helps minimally. I would expect a slight improvement
since you can have more pages open. Hopefully AMD will bring out
LDT + SMP this year so shared FSB's will be thing of th past.
It seems like a fast cluster/interconnect card that does DMA
to main memory might enjoy significantly better bandwidth since
the 1.0 GB/sec peak FSB and 528 MB/sec peak PCI would be sharing
a 2.0 GB/sec memory system.
Of course the real proof would be someone comparing a dual memory
bus system with a single memory bus system with whatever the
fastest DMA pci card they can find.
Please post results if your so lucky, I found the Tyan HESL for $697
on www.pricewatch.com (not a vendor, but a price search engine).
--
Bill Broadley
50% Dept of Mathematics
50% Institute of Theoretical Dynamics
University of California, Davis